Fixed #708: Added 'use strict' and replaced var with let/const in fs.appendFile.spec.js

[DavidLi119]

Added 'use strict' at the top of the file, then replaced var with const:

var ex = 'unchanging';
// change to
const ex = 'unchanging';

Same with let:

var ex = run();
// change to
let ex = run();

[codecov-io]

Codecov Report

Merging #713 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #713   +/-   ##
=======================================
  Coverage   86.71%   86.71%           
=======================================
  Files          16       16           
  Lines        1746     1746           
=======================================
  Hits         1514     1514           
  Misses        232      232

Impacted Files	Coverage Δ
src/shell/environment.js	100% <0%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 26b47ee...64ddef1. Read the comment docs.

[humphd]

This could probably be const

[humphd]

Suggested change

	let fs = util.fs();
	const fs = util.fs();

[humphd]

You can change all your lets to const in this file, since none of the variables are changing after you declare them.

Otherwise, this looks good. Nice work. Let me know when you've done this so I can re-review.

[DavidLi119]

Made all changes that were requested professor. Also, I didn't realize that committing via VSC would commit to github as well, hence the 1 letter commit name at first. I reverted and recommitted properly.

[humphd]

@DavidLi119 I see you've pushed a new commit, and wanted to fix your commit message. Here's a tip:

git commit --amend -m "New commit message"

The --amend will add/to, update, etc. the old commit with whatever you add, which can be as simple as the commit message changing.

[DavidLi119]

Ah, thanks for the recommendation, I will keep it in mind for next time.